Electric switch



Nov. 18, 1924- 1,516,440

G. A. JOHNSON ELECTRIC SWITCH Filed Aug. 9, 1922 .Bi/Vm M 5 A TTOJe/VE Ys Patented Nov. 18, 1924.

unirse-stares PATENT orales.

,Grenen a. manson, or nmnenroa'r, icoNNnc'rIcU'r, Assioma-Torna nn'ir'an'rV Y l nnc'rmc conm; or enmarcar', connnc'rrcuna comonurron or con- 'unicornio swrrcn.

Appunmn'lipazauu 0,1922. 'semina-samen.

To it concern:

Be tknown that I, Gnomes A.' JonNsoN,

` a citizen of the United States'of AAmerica lresiding atBridgeport, in the county o IFairfield and State' of Connecticut, have invented certain new 'and ruseful Im rove- -ments inA Electric -Switches, of whic the following is a specification. f

' My invention relates to electric switches,

and particularly toswitches of the toggle lmechanism type. The object of my invention is to provide amechanism of improved construction, having certain features *of novelty I of construction and :affording a positive throw of the switch blade 'when the op''ating lever is" actuated.

In'the accompanying drawingsf Fi 1 is a sideelevatlon of a switchshowing t e fechanism in which my invention is emboli'eclsin one form; Fig. 2 is' a section, on the `Fig'. 3 is central longitudinal section through` .the "actuatingmechanism and switch base;A f

Fig. 4 is a perspective Yof the switch operf' ating lever and ilgm. 5 is a section onlthe line`5-5,Fig. 3. ile the invention is illustrated in a double poleswitch'of the' anel-boardgtype,

from it will be recognized that t e mechanism, to Vwhich the invention sis particularl'A directed, may be embodied in a single or ouble pole switch of any Aa propriate t pe, such for instance as a sur ace or a ilus switch. As here shown, the switch comprises an insulating block 6 of generally rectangular shape,

the corners of which depend the supportin straps 7, 8, 9 and 10 each having an oiset oot. piece 11 secured by rivets 12 to a spacer sheet 13 of insulatingl material. Beneath the latter, and also engaged by the rivets 12, are contact plates 14 adapted to rest upon the conductor bars of a panel "l" comtrising a bridge member 21 secured benea the insulat' block 6 by screws 22,

`and having oset m its o 'te sides a of frame yplates 23 `posed at t line 2 2, Fig. 1;.

. plates.

in 25, .which'traverses the upper portion o the `frame plates 23 and l24, is the two-leggedv switch operating lever `26, which asses up through a aperture 27 in t e frame and carries at its outer endf a,thumlov piece 28l of insulating material. The lower `portion of the thumb kpieoeis laterally exitendedtoform shoulders 29 and 30 u on the vouterfaces of which are legends 31 ig. 4 ,y one or the other of which is ex- 'l e slot 32 in the block v6 throu l1 which the operatinglever passes;l The en s fof the shoulders 29 and 30 `are suitably shaped to properly 'limit the throw vof the switch lever bytheir impingement against 7 the upperl kface of lthe'bridge member 21 'of the frame atthe oppc'isite extremes ofthe lever. movement. y 1 Cooperating with Athe lever isa switch bar yoke 33, which straddles the side lates 23l and 24 of the frame, and is journa ed upon lugs 34 struck outwardlyr from the side The latter are cut away at 'their owermargins to afford two pairs of stops 35 and 36, between which the cross vbar ofl theswitchl yoke travels, ,and'by which the -anrgillar throw of the .yoke is'limite'dfv f e' spring 37 for imparting ysnapn'iotion to the switch bar yoke, is :mounted upon-the guide pin .38, one end fof which passes through the cross barof the yoke 33, while its` opposite end bears' against an abutment 39 resting aainstfthe lower ends of the of fthe switc lever 26. -The throwY of'y switch bar from one side to the other o f its n arc of travel, is occasioned, as in the usualv type of toggle switch construction, by slifting of the a utment 39 for the switch spring. across the axis of oscillation of the switc bar yoke by the movement of the actuating). lever 26. In order to insure the initiation of the i throw of the yoke, regardless of the ,frictional drag which may be im sed thereon by the en agement of the bla es 19 and v,20 with the ed ycontacts 15, 16, 17 and 18 of the switch,-I provide a positive kick-o engement between the switch bar yoke and e 'operating lever. For thisf u the legs of the lever 26 are provide with bays 105 la ertured in register at 40, while the sides of t e yoke 33 are extended substantially above its pivoting axis 34 and provided with studs 41 which pass through arcuate slots 42 in the frame plates 23 and 24, and are engaged v1.10

loo

wahistiotioa bewees this side margins of the holes in the legs of the operating lever.

ment39 toward the axis of oscillation of the' switch bar yoke, the lugs 41 of the latter be-r ingl then picked up by the sides offfthe hole 40 in the lever 26, thus establishing a posi-- ytive connection between the lever and the :yoke which causes the" latter to positively i rock on t'saxis-in the direction of itsmovement `underA the throw of the switch spring v.37l after the abutment 39 has crossed the ,axis- 34 on Vwhich the yokeis pivoted. Thisy positive connection between the parts is `of special advantage vin assuring the opening of i the sw1tch,^s1nce 1n somecases the'frictional engagement between the blade 20 and theco-V 4operatingn vfixedy contacts' of the switch is so toexceed Ythe biasing 'efortof the great as y Y In'su'ch'case, the throw of the switch spring.

'operating lever in the direction to openl the switch would failto cause vanV interruption of:

rthecircixitwere it-not for .the positlve lost- ,.o'f the studs, by means` 0f which the 'Y switch V bars are yI neunted on theyoke'. This 'particu-4 struction, and

.motion, kick-olf connection afforded' inthe `present'constructie'nl y f i In the constrntionshownythe lugs 41 of ythe switch ,bar yoke are inward i extensions ,lar construction is not essential, however.

` Asabove stated, thein-vention is not lim? ited to ifanyVpartimlarV type of switch coni -rnoreove"r,the details 'of shape and arr ment ofthe parts may 'varionsly modified. withoutdeparting from jwhat I, claim as my invention..

*A 1. an, electric switch having 'a' toggle y spring mechanism,

a vswitch frame compris# ing a plate, a4 ivoted switch-operating lever i ylying on onefslde 'of said plate, a switch barf vThis Vlost motion connection permits l the operatinglever to shift the spring abut- `plate, v vranged on one side of saidy framel plate, va

tween' said stud and the operatingv lever serving `to 'initiate the throw of the carrier in the from the'switch.

direction of the toggle action, together with a-switch blade mounted on said carrier, said stud forming portion of the blade mountingi 2. In an electric switch, -a `slotted switc frame plate, a pivoted switch-operating' len verl arranged on one 'side `of said frame plate and bein apertured inregister with said.

slot, a Yswitch bar pivoted on a fixed axisI and arranged on the .opposite sideof lsaid plate projecting through, lthe f 'and having a stu slot in the frame into the'aperture in the o verating. lever, and a. spring operatedftogg e operating lever and vconnection between` the switchbar. y' r v 3;In an electric-switch, a switch ,frame Ia pivoted switch operating leverl arpivotedswiteh bar arranged on the opposite side of said frame plate, a spring operated toggle connectionrbetween the switch operating lever and the `switch bar, lin comblnationwith a stud carried by one .of said members, the other member and the switch framey l plate `,being transversely apertured in register to permitsaid stud to pass through the yframe plate finto lost motion lengagement 'with the slotted member, the slot in saidslot ted member being ofsuch dimensions that its engagement with the stnd'. occurs substantia yzcoincidentfwith the shifting ofthe togle jointvffromone yside -to l the other o f the axis'of oscillationof the switch har,A ,f 1

- YIn testimony whereof -I- have signed-,my

GEORGE A iJoinrsoN. 

